EP0301433A2 - Composition de résine de revêtiment - Google Patents

Composition de résine de revêtiment Download PDF

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Publication number
EP0301433A2
EP0301433A2 EP88111855A EP88111855A EP0301433A2 EP 0301433 A2 EP0301433 A2 EP 0301433A2 EP 88111855 A EP88111855 A EP 88111855A EP 88111855 A EP88111855 A EP 88111855A EP 0301433 A2 EP0301433 A2 EP 0301433A2
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EP
European Patent Office
Prior art keywords
composition according
epoxy resin
group
meth
acrylamide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP88111855A
Other languages
German (de)
English (en)
Other versions
EP0301433A3 (fr
Inventor
Michiharu C/O Gijutsuhonbu Of Kansai Kitabatake
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kansai Paint Co Ltd
Original Assignee
Kansai Paint Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kansai Paint Co Ltd filed Critical Kansai Paint Co Ltd
Publication of EP0301433A2 publication Critical patent/EP0301433A2/fr
Publication of EP0301433A3 publication Critical patent/EP0301433A3/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
    • C09D5/4419—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained otherwise than by polymerisation reactions only involving carbon-to-carbon unsaturated bonds
    • C09D5/443—Polyepoxides
    • C09D5/4434—Polyepoxides characterised by the nature of the epoxy binder
    • C09D5/4442—Binder characterised by functional groups
    • C09D5/4446—Aliphatic groups, e.g. ester
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/50—Amines
    • C08G59/54—Amino amides>
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/62—Alcohols or phenols
    • C08G59/64—Amino alcohols
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins

Definitions

  • This invention relates to a novel coating resin composition. More specifically, it relates to a coating resin composition having improved water-dispersibility and throwing power property, which is suitable especially for cathodic electrodeposition coating.
  • Resin binders hitherto used in many cathodic electrodeposition coating resin compositions are, in general, polyamine resins such as amine-added epoxy resin.
  • polyamine resins such as amine-added epoxy resin.
  • adducts of polyepoxide with second­ary amine such as diethanolamine, ethylethanolamine and the like are often used.
  • These resins are crosslinked and cured with a polyisocyanate compound blocked with alco­hols, to form electrodeposition coatings, and they are highly evaluated in respect of the anticorrosion property of coatings.
  • the above polyamine resins using a tertiary amino group as a cationic group have poor water-­dispersibility in a stage of partial neutralization by a small amount of a neutralizing agent, and consequently, have a defect that they cannot give a cathodic electro­deposition coating resin composition having high pH values and high throwing power property.
  • the water-dispersibility of resultant polyamine resin is good.
  • the resultant polyamine resin is used in combination with a curing agent having a low temperature-curing blocked isocyanate functional group or functional group having active double bonds (e.g., iso­cyanate blocked with hydroxyethylacrylate)
  • a curing agent having a low temperature-curing blocked isocyanate functional group or functional group having active double bonds e.g., iso­cyanate blocked with hydroxyethylacrylate
  • the resultant coating resin composition has poor stability due to the presence of active hydrogen-­containing cationic groups in the polyamine resin, and therefore, cannot be put to practical use.
  • a coating resin composition capable of achieving the above object can be obtained by using, as a coating-forming resin binder component, an epoxy resin derivative obtained by reacting the epoxy group of epoxy resin with a Michael addition reaction product of mono­alkanolamine and dialkylaminoalkyl(meth)acrylamide. This finding led to completion of this invention.
  • a coating resin composition comprising, as a coating-forming resin binder, an epoxy resin derivative containing a functional group represented by the follow­ing formula wherein R1 represents a hydrogen atom or methyl group; each of R2 and R3 represents C1-C5 alkyl group independently of other; R4 represents a C2-C6 alkylene group in which an ether group (-O-) may be present in the carbon chain; and n represents an integer from 1 to 6.
  • the epoxy resin derivative for use as a coating-­forming resin binder in the coating resin composition of this invention is one obtained by introduction of the functional group of the above formula (I) into an epoxy resin which is a substrate resin.
  • the introduction of the functional group (I) can be carried out, for example, by reacting the secondary amino group of a Michael addi­tion reaction product of monoalkanolamine and dialkyl­aminoalkyl(meth)acrylamide with the 1,2-epoxy group of an epoxy resin.
  • the Michael addition reaction product (iii) of monoalkanolamine and dialkylaminoalkyl(meth)acrylamide for use in production of the above epoxy resin derivative can be obtained, for example, by a reaction between a monoalkanolamine (i) and a dialkylaminoalkyl(meth)acryl­amide (ii) as shown in the following scheme. wherein R1, R2, R3, R4 and n are as defined above.
  • Examples of the monoalkanolamine (i) for use in the above reaction include 2-aminoethanol, 1-amino-2-­propanol, 2-amino-1-propanol, 3-amino-1-propanol, 2-amino-1-butanol, 2-amino-2-methyl-1-propanol, 5-amino-­1-pentanol, 4-methyl-4-amino-1-pentanol, 2-hydroxy-2′-­ (aminoethoxy)ethylether, 2-hydroxy-2′-(aminopropoxy)ethyl­ether, etc. Above all, 2-aminoethanol and 3-amino-1-­propanol are preferably used.
  • dialkylaminoalkyl(meth)acryl­amide (ii) examples include N,N-dimethylaminoethyl(meth)acryl­amide, N,N-diethylaminoethyl(meth)acrylamide, N,N-­dimethylaminopropyl(meth)acrylamide, N,N-diethylamino­propyl(meth)acrylamide, N,N-dimethylaminobutyl(meth)­acrylamide, etc., and above all, N,N-dimethylaminopropyl­acrylamide is preferably used.
  • Michael addition reaction of monoalkanol amine (i) and dialkylaminoalkyl(meth)acrylamide (ii) can be carried out by a method known per se.
  • said reaction can be carried out by using stoichiometrically equimolar amounts of (i) and (ii) and reacting these two components at a temperature of 20 to 90°C for 2 to 10 hours.
  • a reaction of the resultant Michael addition reaction product (iii) of (i) and (ii) with the 1,2-epoxy group of an epoxy resin can give the coating-forming resin binder in this invention, i.e., an epoxy derivative having the functional group of the foregoing formula (I).
  • the typical reaction here is as follows. wherein represents a skeleton portion of epoxy resin; however, it shall be noted that the above formulae show only one epoxy group for simplification, and that at least one other epoxy group is attached to ; and R1, R2, R3, R4 and n are as defined above.
  • Suitable as the epoxy resin for use in the above reaction are polyepoxide compounds having about two (average value) 1,2-epoxy groups in one molecule and a number average molecular weight of not less than 200, preferably 400 to 4,000, or more preferivelyably 800 to 2,000.
  • Polyepoxide compounds known per se can be used as much, and polyglycidyl ether of polyphenol, which can be prepared, for example, by reacting poly­phenol with epichlorohydrin in the presence of alkali, is included in examples of such polyepoxide compounds.
  • polyepoxide compounds include glycidyl ethers of polyphenols such as bis(4-hydroxy­phenyl)-2,2-propane, bis(4-hydroxyphenyl)-1,1-ethane, bis(4-hydroxyphenyl)methane, 4,4′-dihydroxydiphenyl ether, 4,4′-dihydroxydiphenylsulfone, phenol novolak, cresol novolak, etc., and polymerization products of these.
  • polyphenols such as bis(4-hydroxy­phenyl)-2,2-propane, bis(4-hydroxyphenyl)-1,1-ethane, bis(4-hydroxyphenyl)methane, 4,4′-dihydroxydiphenyl ether, 4,4′-dihydroxydiphenylsulfone, phenol novolak, cresol novolak, etc., and polymerization products of these.
  • polyepoxide compounds es­pecially preferable in view of price and anticorrosion are polyglycidyl ethers of polyphenols having a number average molecular weight of at least about 380, preferivelyably about 800 to 2,000 and an epoxy equivalent weight in the range of from 190 to 2,000, preferably from 400 to 1,000.
  • a polyepoxide com­pound represented by the following general formula is particularly, preferable is a polyepoxide com­pound represented by the following general formula.
  • polyglycidyl ethers of cyclic compounds such as bis(4-hydroxycyclohexyl)-2,2-propane, bis(4-­hydroxycyclohexyl)methane, etc., polyglycidyl esters of terephthalic acid, tetrahydrophthalic acid, etc., epoxidized 1,2-polybutadiene, glycidyl(meth)acrylate copolymer, etc., in addition to the above-mentioned polyepoxide compounds.
  • the reaction between an epoxy resin and Michael addition reaction product (iii) proceeds by merely heating, in general, up to 80 to 140°C, preferably 100 to 120°C, and an alcohol-type, ketone-type or ether-type solvent may be used as required.
  • the proportions of the 1,2-epoxy group of epoxy resin and Michael addition reaction product (iii) in use are not critical, and may be selected freely.
  • said propor­tions in molar ratio are usually in the range of from 2/1 to 1/1, particularly in the range of from 1.5/1 to 1.2/1, in order to avoid the presence of remaining un­reacted Michael addition reaction product (iii) and gelation by remaining epoxy groups. In the case when said ratio exceeds the above range, it is desirable to allow a part of the 1,2-epxoy groups to react with the other reaction agent in advance.
  • the amount of Michael addition reaction product (iii) to be preferably introduced is in the range of, in general, from 0.05 to 2.0 moles, particularly from 0.05 to 1.0 mole, per 1,000 g of resin solid content. In the case where said amount is smaller than 0.05 mole, the water-dispersibility is low, and where said amount is larger than 2.0 moles, too large an amount of acid is required for solubilization into water.
  • the resultant epoxy resin derivative may be optionally imparted with other functions by reacting the remaining 1,2-epoxy groups with some other reaction agent. That is:
  • reaction between the above reaction agent or modifier and the epoxy resin derivative in the above (a), (b) and (c) be carried out in advance of the reaction between the epoxy groups and Michael addition reaction product (iii).
  • the former reaction may be carried out, as necessary, simultaneously with or after the latter reaction
  • the pro­portion of said reaction agent or modifier to the epoxy resin should be not more than 1/2 by weight, preferably not more than 1/4.
  • a crosslinking functional group may be introduced into said epoxy resin derivative, or an external curing agent may be used in combination.
  • the crosslinking functional group that may be introduced include a known blocked isocyanate group, beta-hydroxyester group, alpha,beta-unsaturated carbonyl group, N-methylol group, etc.
  • an active carbamic acid ester group represented by the following formula (e.g., see U.S. Patent 4,528,363).
  • X represents a tertiary nitrogen atom, oxygen atom or sulfur atom, or an aliphatic C1-C6 hydrocarbon group having one of these atoms on its terminal;
  • R5 represents a C1-C12 hydrocarbon group which may contain a hydroxyl group or ether bond.
  • Examples of said active carbamic acid ester group include the following (a) to (d). wherein R5 is as defined above; and R6 represents a methyl group, ethyl group, hydroxyethyl group, aminoethyl group or ethyl alkylcarbamate group.
  • Compounds usable as the external crosslinking agent are those having at least two crosslinking groups mentioned above in one molecule, e.g., blocked polyiso­cyanate, beta-hydroxyethylester of polycaroboxylic acid, malonic acid ester derivative, methylol-substituted melamine, methylol-substituted urea, etc.
  • the tertiary amino group in the functional group (I) into a proton by water-soluble carboxylic acid such as formic acid, acetic acid, lactic acid, etc.
  • the amount of acid (nuetralization number) to be used for the conversion to proton cannot be strictly defined. In general, however, the preferable amount is in the range of from about 5 to about 40 KOH mg number, and especially it is in the range of from about 10 to 20 KOH mg number per 1g of resin solid content.
  • the resultant aqueous dispersion is suitable especially for cathodic electrodeposition coating, and in such an application, a pigment, solvent, curing catalyst, surfactant, etc., may be used in combination with the aqueous dispersion as required.
  • a substance to be coated is used as a cathode, and a stainless or carbon steel is used as an anode.
  • the usable coating conditions are not specially limited.
  • the coating deposited on a substance to be coated can be cured by washing it and then baking it at a temperature of about 140°C to 180°C.
  • the coating resin composition obtained accord­ing to this invention makes it possible to obtain high throwing power property owing to excellent water-disper­sibility in low neutralization obtained by using the epoxy resin derivative having the functional group of the foregoing formula (I) as a coating-forming resin binder, even if the cationic group in the functional group (I) which imparts water-dispersibility is a tertiary amino group. Further, even if a curing agent having a low temperature curing type blocked isocyanate group or double bond is used in combination, it is possible to obtain a coating resin composition suitable for cathodic electrodeposition coating without impairing stability, due to the absence of an active hydrogen-containing cationic group in the functional group (I).
  • Monoethanolamine (61 parts) was charged into a reaction vessel having a thermometer, stirrer, reflux condenser, dropping funnel and nitrogen gas-blowing port while a nitrogen gas was blown into the vessel, and the temperature of the vessel was elevated up to 60°C. Then, 156 parts of N,N-dimethylaminopropylacrylamide was added dropwise through the dropping funnel, and the reaction was carried out at 60°C for 5 hours to give an adduct of N,N-dimethylaminoproylacrylamide with monoethanolamine.
  • the electrodeposited coating was baked at 160°C for 20 minutes to give a smooth-surface coating having a thickness of about 30 ⁇ .
  • the salt spray resistance of the coated plate was good, i.e., the coating withstood the salt spray for 2,000 hours. Its throwing power property (test method to be specified later) was also as good as 21 cm.
  • 2,4-Toluenediisocyanate 174 parts
  • 116 parts of hydroxyethyl acrylate, 0.5 part of methoxyphenol and 124 parts of methylisobutyl ketone were charged into a reaction vessel having a thermometer, stirrer, reflux condenser, and air-blowing port while air was blown into the vessel, and the reaction was carried out until the NCO value was not more than 1, by elevating the tempera­ture of the vessel up to 100°C to give a curing agent having a solid content of 70%.
  • Example 2 An epoxy resin derivative obtained in Example 1 (91 parts), 38 parts of the above curing agent and 1 part of polypropylene glycol were mixed, and then 14.9 parts of acetic acid (neutralization value: 14) was added. The mixture was warmed up to 60°C, and water-dispersed by adding deionized water gradually, to give an emulsion having a resin solid content of 30%, an average particle diameter of 0.2 ⁇ and pH 6.2 and having good stability. The emulsion was formed into a coating composition and the composition was electrodeposited on a plate in the same way as in Example 1. The electrodeposited coating was baked at 150°C for 20 minutes to give a smooth-­surface coating. The salt spray resistance of the coated plate was good, i.e., the coating withstood the salt spray for 2,000 hours. The throwing power property of the coating was as good as 20 cm.
  • a resin was synthesized by repeating Example 1 except that 178 parts of ethylethanolamine was used in place of 43 parts of the adduct of N,N-dimethylamino­propylacrylamide with monoethanolamine to prepare an emulsion.
  • the resultant product had an average diameter of more than 0.6 ⁇ and was separated to two layers.
  • the above product was emulsified by increasing the amount of acetic acid (neutralization value: 20) to 2.13 parts to exhibit an average diameter of 0.1 ⁇ .
  • the resultant emulsion has low pH of 5.6, and its throwing power property was as small as 17 cm, i.e., was not satisfactory.
  • An apparatus used for throwing power property is as schematically shown in Figures 1 to 3.
  • Z Insulating material
  • A Plate to measure an outer plate coating thickness (30 x 150 x 0.8 mm). See Figure 2.
  • B Plate to measure an inner plate throwing power (15 x 300 x 0.4 mm). See Figure 3.
  • T Mercury thermometer (scales up to 50°C).
  • Figure 1 shows a schematic view of an apparatus for use in testing the throwing power property of an electrodeposition coating composition.
  • Figure 2 shows a schematic view of a plate to measure a coating thickness on an outer plate for use in said test.
  • Figure 3 shows a plate to measure the throwing power property on an inner plate.
  • Figure 4 shows the height of a coating on said inner plate.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Molecular Biology (AREA)
  • Paints Or Removers (AREA)
  • Epoxy Resins (AREA)
EP19880111855 1987-07-25 1988-07-22 Composition de résine de revêtiment Withdrawn EP0301433A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62185666A JPS6429466A (en) 1987-07-25 1987-07-25 Coating resin composition
JP185666/87 1987-07-25

Publications (2)

Publication Number Publication Date
EP0301433A2 true EP0301433A2 (fr) 1989-02-01
EP0301433A3 EP0301433A3 (fr) 1990-09-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880111855 Withdrawn EP0301433A3 (fr) 1987-07-25 1988-07-22 Composition de résine de revêtiment

Country Status (4)

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US (1) US4977203A (fr)
EP (1) EP0301433A3 (fr)
JP (1) JPS6429466A (fr)
CA (1) CA1323137C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444710A3 (en) * 1990-03-02 1992-09-23 Kansai Paint Co. Ltd. Coating resin composition
CN112469757A (zh) * 2018-07-27 2021-03-09 汉高股份有限及两合公司 基于环氧化物的两部分组合物

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5235007A (en) * 1991-10-03 1993-08-10 Texaco Chemical Company Epoxy curing agents
JPH05156183A (ja) * 1991-12-05 1993-06-22 Kansai Paint Co Ltd 水性分散液
DE4201054A1 (de) * 1992-01-17 1993-07-22 Basf Lacke & Farben Aminomethylen-gruppen tragendes epoxidharz

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305493A (en) * 1961-12-20 1967-02-21 Rohm & Haas Condensation products and methods of making them
CH499496A (de) * 1968-06-05 1970-11-30 Inventa Ag Verfahren zur Herstellung von Kondensationsprodukten
CH506484A (de) * 1969-03-20 1971-04-30 Inventa Ag Verfahren zur Herstellung von Additionsprodukten
US3878247A (en) * 1974-01-25 1975-04-15 Jefferson Chem Co Inc Preparation of n-(tertiaryaminoalkyl) acrylamides
US4316784A (en) * 1978-08-28 1982-02-23 Ppg Industries, Inc. Process for electrodeposition of Michael adducts of polymeric materials
US4383103A (en) * 1982-02-08 1983-05-10 Milliken Research Corporation Aminoalkoxyamides and epoxy resin compositions containing same
DE3382819T2 (de) * 1982-09-21 1998-08-27 Ajinomoto Kk Latente Härter für Epoxyharze
JPS6072924A (ja) * 1983-09-30 1985-04-25 Nippon Oil & Fats Co Ltd 塗料
US4721742A (en) * 1986-11-07 1988-01-26 The Dow Chemical Company Amide modified epoxy resins from a dialkanolamine, a monoalkanolamine, an anhydride and (an) unsaturated monomer(s)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444710A3 (en) * 1990-03-02 1992-09-23 Kansai Paint Co. Ltd. Coating resin composition
US5283124A (en) * 1990-03-02 1994-02-01 Kansai Paint Co., Ltd. Coating resin composition
EP0768327A3 (fr) * 1990-03-02 1997-10-22 Kansai Paint Co Ltd Composition de résine pour revêtement
CN112469757A (zh) * 2018-07-27 2021-03-09 汉高股份有限及两合公司 基于环氧化物的两部分组合物
EP3830169A4 (fr) * 2018-07-27 2022-03-02 Henkel AG & Co. KGaA Composition à base d'époxy en deux parties
CN112469757B (zh) * 2018-07-27 2023-07-14 汉高股份有限及两合公司 基于环氧化物的两部分组合物
US11866535B2 (en) 2018-07-27 2024-01-09 Henkel Ag & Co. Kgaa Two-part epoxy based composition

Also Published As

Publication number Publication date
JPS6429466A (en) 1989-01-31
EP0301433A3 (fr) 1990-09-12
CA1323137C (fr) 1993-10-12
US4977203A (en) 1990-12-11

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